// Twitter client sketch for ENC28J60 based Ethernet Shield. Uses
// arduino-tweet.appspot.com as a OAuth gateway.
// Step by step instructions:
//
// 1. Get a oauth token:
// http://arduino-tweet.appspot.com/oauth/twitter/login
// 2. Put the token value in the TOKEN define below
// 3. Run the sketch!
//
// WARNING: Don't send more than 1 tweet per minute!
// WARNING: This example uses insecure HTTP and not HTTPS.
// The API key will be sent over the wire in plain text.
// NOTE: Twitter rejects tweets with identical content as dupes (returns 403)
//
// License: GPLv2

#include

// OAUTH key from http://arduino-tweet.appspot.com/
#define TOKEN "Insert-your-token-here"

// ethernet interface mac address, must be unique on the LAN
byte mymac[] = { 0x00,0xFF,0xDC,0x7A,0x55,0x9C };

const char website[] PROGMEM = "2346581264-H0qQ7jHFpZodFmudJzzPUPEftd2oHWmi9OqnZcp";

static byte session;

byte Ethernet::buffer[700];
Stash stash;

static void sendToTwitter () {
Serial.println("Sending tweet...");
byte sd = stash.create();

const char tweet[] = "trdgvjbhjkj";
stash.print("token=");
stash.print(TOKEN);
stash.print("&status=");
stash.println(tweet);
stash.save();
int stash_size = stash.size();

// Compose the http POST request, taking the headers below and appending
// previously created stash in the sd holder.
Stash::prepare(PSTR("POST http://$F/update HTTP/1.0" "\r\n"
"Host: $F" "\r\n"
"Content-Length: $D" "\r\n"
"\r\n"
"$H"),
website, website, stash_size, sd);

// send the packet - this also releases all stash buffers once done
// Save the session ID so we can watch for it in the main loop.
session = ether.tcpSend();
}

void setup () {
Serial.begin(57600);
Serial.println("\n[Twitter Client]");

// Change 'SS' to your Slave Select pin, if you arn't using the default pin
if (ether.begin(sizeof Ethernet::buffer, mymac, SS) == 0)
Serial.println(F("Failed to access Ethernet controller"));
if (!ether.dhcpSetup())
Serial.println(F("DHCP failed"));

ether.printIp("IP: ", ether.myip);
ether.printIp("GW: ", ether.gwip);
ether.printIp("DNS: ", ether.dnsip);

if (!ether.dnsLookup(website))
Serial.println(F("DNS failed"));

ether.printIp("SRV: ", ether.hisip);

sendToTwitter();
}

void loop () {
ether.packetLoop(ether.packetReceive());

const char* reply = ether.tcpReply(session);
if (reply != 0) {
Serial.println("Got a response!");
Serial.println(reply);
}
}